JACOBUS PETRUS PRINSLOO

• Evaluated and monitored drilling operations, ensuring compliance with safety regulations.
• Provided technical support for on-site personnel during drilling operations.
• Conducted post-drilling evaluation of well performance and provided recommendations for improvement.
• Established parameters and procedures for monitoring drill bit wear, rate of penetration, fluid flow.
• Monitored daily progress reports from contractors to ensure compliance with company standards.
• Performed risk analysis to determine potential hazards associated with each project.
• Planned and coordinated equipment and inventory to prepare materials necessary for projects.
• Dolomite large diameter water well contract for Department of Water Affairs RSA.
• Foundation holes for precast piles in Dolomites at Verwoerdburg near Pretoria, for Esor Geotechnical Engineering.

- Maximum depths 120m

- Diameter 380 mm

- Completed 2 contracts

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• Large Diameter Water Supply Project for Department of Water Affairs, RSA in Outshoorn/De Rust area, Cape Province.

- Average depths 250m

- Diameter 254mm and 204mm

- Formation Table Mountain Sandstone Series

- Completed 23 boreholes in 9 months.

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• 8 Large diameter water wells for Municipality of Potgietersrust
• De-Watering of Kolwezi Copper Mine, Zaire (Was 9 months in Zaire as a driller)
• 30° Angle Reverse Circulation Drilling, for Anglo American for copper near Maun, Botswana.
• Various Pressure grouting

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- Pilot holes at the goldfields for:

- Angola American

- JCI

- Glencor – Depth up to 800m

Drilled 330mm holes 150m deep installed 7 inch Oilfield casing and

pressure grouted. For: Pioneer Drilling at Fochville and Alberton

• Drilling for Methane gas near Kroonstad, Freestate province RSA

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- Depth 600m

- Number of boreholes – 3

- Diameters started – 330mm, install 7” oilfield screw and socket casing down to depth of 100m.

- Pressure grout casing continued drilling 6¼” down the hole hammer.

- Made use of blow out preventers.

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• Drilled waterwells over the period 1988 to 1990 in the TMG Aquifer to depths of 400m in the following areas.

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- ELGIN/GRABOUW/VILLIERSDORP

- TOUWSRIVIER

- LADYSMITH

- B0- LANGKLOOF

• Managed daily operations of business, including hiring and training staff.
• Identified new opportunities for growth, expansion, and diversification.
• Negotiated contracts with vendors and suppliers.
• Implemented quality assurance processes to ensure product excellence.
• Researched potential partners in order to expand services offered.
• Collaborated with other owners on joint ventures and shared resources.
• Oversaw project execution, phase progress, workmanship and team performance to drive on-time completion of deliverables.

Areas:

Drought Relief Programmes in Namibia

- Namaland (50 Boreholes)

- Rehoboth (12 boreholes)

- Western Ovambo (15 Boreholes)

- North-eastern Kaokoland (15 Boreholes)

- Rietfontein and Eiseb Blocks of Eastern-

- Hereroland Reserve (2 Boreholes)

- Ovitoto Reserve (2 boreholes)

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No. Of boreholes: 107 boreholes

Average depth: 200-300m

Final diameters: 204mm & 177mm

Yields: 0,5m³/h to 50m³/h

Areas:

- Khomashochland Windhoek District Namibia

- Rehoboth District

- Leonardville

- Gobabis area

- Omitara

- Hochfeld

Area: Windhoek Town lands Namibia

Address: P O Box 59, Windhoek

No of boreholes: 40 Holes

Average depth: 250 – 300m

Final Diameters 207mm cased

Yields: 50m³ - 130m³

Area: Sub Artesian Area, South East Kalahari Namibia

Total meters: 5 900m

Yields: 14 – 70m³

Deepest Boreholes: 340m

Area: Goblenz Namibia

Total meters: 2600

Yields: 150m³

Drilling size: 330m/m (12¼”)

Deepest Boreholes: 460m

Techniques used: Direct flush mud rotary

Did drilling work and test pumping work

Contact Person: Mr Otto van Vuuren Tel: +264 61 712131

Project Manager: J P Prinsloo (Joint venture)

Area: South Eastern Kalahari

Stampriet Sub Artesian Basin Namibia

Contact Person: Mr Hata

Address: email: hata@pcitokyo.co.jp

Mr Frank Bockmuhl

Tel: +264 81 127 8665

No of Boreholes: 19 Holes

Average depth: 189m

Final Diameters: 6” cased

Sizes Drilled: 12¼”: 1626m

10” : 1558m

8” : 806m

Casing Installed: 10” : 993m

8” : 2212m

6” : 3548m

Total Pressure Grout: 3400m

Johnson Screens used: 494 x 6”

Techniques Used: Direct flush mud rotary and air rotary

This contact was completed in seven months. 1 April 2000 till 31 October 2000.

J P Prinsloo was the project Manager for this project. (Joint venture)

• Various small projects in Namibia

Area: Namibia

Area: Tsumeb – The Tsumeb Ground-water study Namibia

Contact Person: Mr Greg Chistelis

Tel: +264 61 2087089

Dr Kirgner

Tel: +264 61 208 7089

Mr Hartmud Strub

No of Boreholes: 18

Maximum depths: 400m

Sizes drilled: 12¼”, 9”,8”

Yields: Pumped at 250m³/hr

This project was managed by Geomechanic from Germany

Drilling was a joint venture. Pumptesting was done by N P Mostert

Area: Karas – Grunau and Gainaches Namibia

Contact Person: Mr O Van Vuuren

Tel: +264 61 712131

Area: Omaheke, Hardap and Karas Namibia

No of Boreholes: 18

Bh’s up to 10” and 250m deep

Area: Karas – Mariental Namibia

Number of Holes: 60 x Foundation holes

Area: Otjozondjupa – Tsumeb Namibia

Single and double packer tests

Area: Hardap Namibia

Single and double packer tests

Area: Tsumeb

Boreholes for Railway Extension

Area: Kavango / Caprivi Namibia

No of holes: 65

Contact Person: Dr Jens Wrabel;

Tel: +264 61 208 7102

Areas: Omaheke, Karas, Hardap, Khomas Namibia

No of holes: 60

Area: Tsumkwe Namibia

Type of Work: Exploration work. Drilling through a diverter

and a cyclone

Area: Hardap and Khomas Namibia

Type of work: Rehabilitation and relevant work for private Farmers using a cable tool machine.

Area: Erongo Namibia

Number of boreholes: 18

Type of work: Water supply and rehabilitation

Area: Otjozondjupa, Hardap, Karas, Erongo Namibia

Number of boreholes: 23

Type of work: Drought relief, production, exploration & rehabilitation.

Contact Person: Dr Jens Wrabel

Tel: +264 61 208 7102

Area: Khomas Nambia

Type of work: Drill one borehole for Kransneus School

Contact Person: Mr Diener

Tel nr: +264 61 2084229

Area: Southern Industrial Area, Windhoek Namibia - Ritter’s Toyota premises

Type of work: Drilling of anchor holes in existing excavated holes for foundations for a three story building

Number of boreholes: 39 x 3m deep

Area: Windhoek Town Lands Namibia

Type of work: Drilling of production boreholes that will also be used for artificial recharge for the purpose to secure the water supply for Windhoek for the next 10 years. Start Ø 500mm and drilled to 500 meters deep. Population of Windhoek: 250 000 people.

Contract value: U$3 000 000.00

Number of boreholes: In total 68 boreholes were drilled of which 10 are production wells.

Area: North East Angola, Project Alto Cuilo XA Muteba, Itengo, Saurimo.

Type of work: Drilling of mini bulk samples on Kimberlites down to 613 meters deep and drilling Diameters 444mm, 406mm and 330mm

Number of boreholes: 130

Area: Caprivia & Kavango Regions in North East Namibia.

Type of work: Drought relief, production boreholes and pump testing for the communities.

Number of boreholes: 30

Area: Central West Namibia

Type of work: Drill 3 000 meters of Reverse Circulation Down-the-hole hammer for exploration purpose foruranium.

Number of boreholes: 3 000 meters in 3 weeks

Area: Central South Namibia

Type of work: Drill 4 large diameter water wells on the mine

Number of boreholes: 4

Area: Windhoek

Type of work: Drilling of production and monitoring boreholes for the development of an international 18 hole golf course.

Number of holes: 7

Area: Franceville Gabon

Type of work: Drilling of exploration boreholes for Manganese

Number of boreholes: 400 Boreholes

Project only started end of 2008.

Area: Solwezi, North Zambia

Type of work: Drilling of large diameter de watering boreholes on a copper mine.

Number of boreholes: 10

Area: Amman, Jordan

Type of work: Down the hole hammer drilling Reverse Circulation Ø127mm

Number of boreholes: Grid drilling, 20 000m

Area: Frontier, Democratic Republic of the Congo

Type of work: Drilling of Large Diameter De-watering wells, Ø508mm, 44mm, Copper mine.

Number of boreholes: 10

Area: Aranos Sub Artesian Basin Namibia

Type of Work: Drilling of Replacement borehole for Aranos Town. Pressure Grout sub Artesian aquifer

Number of boreholes: 1 – 300m

Area: Stampriet, Sub Artesian Basin, Namibia

Type of work: Water wells for Farmers, Pressure Grouting, Packer testing

Number of boreholes: 10, average Dept 300m

Area: Kuiseb Basin, Walvisbaai Namibia

Type of work: Drilling of Large Diameter water wells for water supply of Walvisbaai. Gravel pack an Installation of wire wrapped UPVC screens and casing.

Area: Katima Mulilo, Caprivi Namibia

Type of work: Drilling of Earthling Boreholes for the Zambezi Sub Station for the new Zambezi/Caprivi link. Drill Ø17½”, install steel and UPVC casing,

GRE/Glass fibre Degassing tubes and probes.

Number of boreholes: 3

Area: Lubumbashi, Democratic Republic of the Congo

Type of work: Drilling of large diameter Dewatering wells at Kinsevere Copper Mine, Ø20”, 17½” Install Bridge slot screens.

Number of boreholes: 5

Area: Hochfeld Namibia

Type of work: Diameter Drilling, PQ, NQ, for manganese

Number of boreholes: 3 000m

Area: Mpopo, Angola

Type of work: Diamond Drilling for Gold Exploration NQ, PQ

Number of boreholes: +/- 20 000m

Area: Mbada Mine, Mutare, Zimbabwe

Type of work: Drilling Mini bulk sample holes on lamphorites, Ø17½”

Number of boreholes: 8 000m

Area: Kariba Dam Wall, Zimbabwe

Type of work: Drilling of geotechnical boreholes and in and around the Kariba Dam wall to determine the Stability.

Number of boreholes: 6 000m

Area: Aranos, Namibia

Type of work: Drilling/Pressure grouting and Diamond drilling for coal exploration.

Number of boreholes: 6

Area: Rosh Pinah Namibia

Type of work: Drilling Exploration and Large Diameter Dewatering wells

Number of boreholes: 23

Area: Lubumbashi, DRC

Type of work: 23” Dewatering Wells with 457mm Casing, Flood. RC Airlift.

Number of boreholes: 7

Area: Palmwag Namibia

Type of work: Drilling for Coal Bed Methane Core 850m NQ,HQ

Number of boreholes: 3

Area: Southern Angola

Type of work: Geotek work for factory

Number of boreholes: 35 value NAD3 500 000.00

Area: Windhoek Townlands Nambia

Type of work: Drilling of Exploration and Artificial Recharge Boreholes

Number of boreholes: 12 Holes – INF 629/2012

Area: Etosha Namutoni Namibia

Type of work: Seal leaking artesian well. Drill boreholesUnder artesian conditions. Pump testing.

Number of boreholes: 4

Area: Rosh Pinah, Namibia

Type of work: De Watering Test Pumping 100mᴲ Plus.

Number of boreholes: 8

Area: Menongue Angola

Type of work: Waterwells, Pump testing, Water Tank, Solar Pump Turn Key Project-Water for people

Number of boreholes: 21

Area: Windhoek Townlands

Type of work: Drilling of emergency water supply wells Ø20”, 17½” to, 15”

Number of boreholes: 6 Holes, to 450m

Area: Rosh Pinah Namibia

Type of work: Dewatering Ø381mm to 400m, Test Pumping

Number of boreholes: Supply & install 170kw pumps to 370m

Area: Windhoek Townlands

Type of work: Drilling of emergency water supply wells Ø20”, 17½” to, 15”

Number of boreholes: 6 Holes, to 450m

Area: Stampriet Sub Artesian Basin

Type of Work: Drilling of deep waterwells, Packer Tests, Full hole Pressure grouting

Deepest drilled: 360m

Area: Kitwe

Type Of Work: Drill investigation boreholes for stability of existing slime dams walls.

Area: Southern Namibia

Type of Work: Drilling deep waterwells, Pressure grouting, Drilling of 10” waterwells.

Area: Otjikoto Mine Near Otjiwarongo North Namibia

Type of Work: Drilling deep de-watering well, Drilling method Hammer Drilling, Mud Rotary, Drilling and Flood Reverse Circulation with air lift

Final Depth: 430 meters

Final drill diameter: 380mm, Casing installed 406mm OD by steel, plain and perforated X, 8mm wall X galvanized casing from surface to final depth.

Area: Leonardville, Kalahari

Type of Work: 12 000 meters of NQ and HQ core drilling Up to depth of 400 meters using Atlas Copco CS10 Drillrigs

Area: Mariental South Namibia

Type of Work: Drilling of waterwells for the Ministry

10 inch and 8 inch drilling up to 300 meters Pump tests.

Number of Boreholes: 18 Boreholes

Area: Leonardville, Kalahari

Type of Work: 15 000 meters of NQ and HQ Core Drilling. Up to depths of 400 meters using Atlas Copco CS10 Drill Rigs.

Areas: Kapps Farm, Dordabis, Marula Lodge, Okutala Lodge Grootfontein

Type of Work: Drill water wells for Nambian clients.

Area: Opuwa

Type of Work: Drill 5 000m RC/ANGLE

Area: Opuwa, Grootfontein, Omaruru, Swartbooisdrif

Type of Work: Drill 13 000 m RC/ANGLE, Drill Investigation wells at Okurusu Mine

Area: Tsumeb Earthstation

Type of Work: Drill 100m Seismic Instrumentation Borehole, install casing, pressure grout and test 72 Hours under 43 Bar pressure for leaks.

Area: Kalkrand, Stampriet, Mariental

Type of Work: Drill water wells and Irrigations wells

Area: Otjiwarongo

Type of Work: Drill 2500m RC

Area: Rossing Mine Arandis

Type of Work: Start drilling on 7 000m of Diamond Drilling

Area: Otjiwarongo / Otavi - Otshikoto Mine

Type of Work: Drill a 480m dewatering well, 17 1/2".

Install 480m 16" Steel Casing

Area: Khorixas, Lofdal

Type of Work: Dril 7706m RC

Contact person: Dr. Rainer Ellmies : 0811280282

Area: Witvlei

Type of Work: RC Drilling 3500m

Area: Lofdal

Type of Work: RC Drilling - 8000m

Area: Ondonto

Type of Work: RC Drilling - 2000m

Area: Hochfeld

Type of Work: 4 Water Monitoring boreholes. 48 Hour Pump testing.

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Area: Tsumeb

Type of Work: 4 Water Monitoring boreholes. 48 Hour Pump testing.

Area: Swartbooisdrift

Type of Work: RC Drilling 3500m

Area: Rosh Pinah Nampower

Type of Work: Water supply for Project

3 x Waterwells

3 x Pump Tests